The inhomogeneous Kibble-Zurek mechanism: vortex nucleation during Bose-Einstein condensation

被引：50

作者：

del Campo, A. ^{[1
,2
]}

Retzker, A. ^{[2
]}

Plenio, M. B. ^{[2
]}

机构：

[1] Leibniz Univ Hannover, Inst Theoret Phys, D-30167 Hannover, Germany

[2] Univ Ulm, Inst Theoret Phys, D-89069 Ulm, Germany

来源：

NEW JOURNAL OF PHYSICS | 2011年 / 13卷

基金：

英国工程与自然科学研究理事会;

关键词：

STRING FORMATION; COSMOLOGICAL EXPERIMENTS; SYMMETRY-BREAKING; PHASE-TRANSITION; DYNAMICS; VORTICES; DEFECTS; BIG;

D O I：

10.1088/1367-2630/13/8/083022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Kibble-Zurek mechanism is applied to the spontaneous formation of vortices in a harmonically trapped thermal gas following a temperature quench through the critical value for Bose-Einstein condensation. Whereas in the homogeneous scenario, vortex nucleation is always expected, we show that it can be completely suppressed in the presence of the confinement potential whenever the speed of the spatial front undergoing condensation is lower than a threshold velocity. Otherwise, the interplay between the geometry and the causality leads to different scaling laws for the density of vortices as a function of the quench rate, as we also illustrate for the case of a toroidal trapping potential.

引用

页数：12

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